2.73 or 3.23?

So I was on a site looking up engine specs and I noticed that gearing for the automatics has a standard option(2.73) then theres another option(3.23) so just wondering how do I know which gearing my car is set up for? Now I noticed the board has been dead lately so I'll wait a while for some answers..and if that fails I'll just ask on the camaro forum :iceslolan

Check your drivers side door for your option codes.
If you see GU5 that's a 3.23 car and a 3 series carrier. If you see GU2 it is a 2.73 car and a 2 series carrier. Know what it is before you switch gears because the new gears will be carrier specific.

hey that was quicker than expected..but I checked the sticker on the inside of the door and all im seeing is tire pressure, weight info, etc.. I'm not seeing any codes like that, but i'll look again..

Right here....
http://www.arbybean.com/ar/images/RPO.JPG

I see, well theres my problem then, i don't have a service parts id sticker, all right well thanks I'll have to find out some other way :shakehead

At WOT what MPH does it shift outta first at??

i'll have to get back to you on that one, it's been a while since I've really opened the car up, its been raining a bit and all so as soon as I have the chance I'll let ya know..

i know to check mine [second gen] and a friends 3rd gen camaro, u crawl under the passeneger side of the car by the rear diff, and on the top front part of the passenger side axel housing close to the carrier, it has the code stamped into the housing.. mine need to wire brush it a bit to get the code visible, then check ur haynes manual

drive it up to 80 mph and floor it and if it downshifts to 2nd gear that means you got 2.73 gears.. my point is, 2.73 grears downshift almost at many speeds but 3.23 gears dont downshift as much as 2.73 gears do.

Erdal

hey there, also you can look in your glove box and you should have a sticker there as well with all the codes on it.....i didnt have one on my door either, but it was in the box.....i am lucky and got a car with the 3.23 gears!!!! good luck!!!!

After you run it up through the gears a bit...if you shift around 60mph, you have 2.73s. around 45-50, you have 323s.

After you run it up through the gears a bit...if you shift around 60mph, you have 2.73s. around 45-50, you have 323s.

what do you mean?? when you floor it, if it shifts on 45-50mph he got got 3.23s. if it shifts on 60mph he got 2.73s?? is this at the first gear?? are you sure that is correct?

when l floor my car, it shifts at 47-50mph to second and then right on 90mph to third and l dont know which mph to fourth because of the speed limiter.. and l think l got 2.73s.. am l right??

okay, well first of all i have no parts sticker in my glovebox so as far as I can tell there is no easily visible parts identification on my car, anyway I took it out tonight for a drive and opened it up, not too hard but enough and i noticed a few things, I don't know what speed it shifts out of first but I did find that the car changed shifts at 45-50 and 60 mph, and it also downshifted at 80, so as far as I can tell I have 2.73's, I'm still not completly sure but I'm gonna look up some more ways to find some parts id on my car and maybe take it out again for some more hard driving :grinyes:

what do you mean?? when you floor it, if it shifts on 45-50mph he got got 3.23s. if it shifts on 60mph he got 2.73s?? is this at the first gear?? are you sure that is correct?

Bingo was his name o.

when l floor my car, it shifts at 47-50mph to second and then right on 90mph to third and l dont know which mph to fourth because of the speed limiter.. and l think l got 2.73s.. am l right??

Nope, you should have 323s. Unless your transmission gearing has been changed. Then again, I don't know what year car yours is but if you have a 3rd gen and are shifting before that, you may have 3.08 gears(drum brakes are a dead giveaway with this) and 273 geared 3rd gens came with disc brakes(if my memory serves me correct.

My car is 4th gen. 1997 LT1 formula.

another way to determine gearing from what i read was place a mark on the drivershaft and housing and have someone turn the rear wheel, count how many times the drive shaft turns and crosses the mark...2.75 turns = 2.73 gears, over 3 turns and you know you got 3 something gears!!!

Like was mentioned Glove box doors on 95 is where the rpo's are and another easy way is to just open her up and look on the side of the ring gear.

allright well I found the codes, I hadn't thought to look on the actual door of the glovebox :shakehead anyway yeah I have the GU2 so i guess i got the 2.73's..oh well when i decide whether to engine swap on the car or just modify i can always get some new gears :grinyes:

You will need to step up to a 3 series carrier or used special 2 series gears (made by richmond or strange) is you use gears ratios higher than a 3.08

You will need to step up to a 3 series carrier or used special 2 series gears (made by richmond or strange) is you use gears ratios higher than a 3.08


Screw the gears, just get a good torque converter! :grinyes:

actually thats what i've been planning since i bought the car, better torque converter and then either mods or engine swap, maybe a 383 :grinyes: